A recent report from Mammus Consulting highlights that Dacheng Construction Group of Japan has unveiled a cutting-edge building structure monitoring system in collaboration with Yokogawa, Nagano Japan Wireless Co., Ltd., and the University of Tokyo. This innovative system utilizes high-precision MEMS (Micro Electro Mechanical Systems) sensors paired with wireless technology operating in the 920 MHz band, enabling long-term and accurate structural stability monitoring. The building structure monitoring system was developed as part of a project commissioned by NEDO (New Energy and Industrial Technology Development Organization), focusing on infrastructure maintenance and renewal. This initiative reflects Japan’s growing concern over aging infrastructure and its efforts to leverage industry-academia-government partnerships for sustainable solutions. Yokogawa provides the high-precision MEMS sensors, while Nagano Japan Wireless offers reliable wireless communication in the 920 MHz frequency range. Dacheng Construction Group and the University of Tokyo are responsible for evaluating the structural integrity of buildings. The newly developed MEMS sensors offer exceptional accuracy, with vibration sensors capable of detecting changes as small as 1 mgal (where 1 gal equals 1 cm/s²) and strain sensors measuring deformations down to 1 nm. These features allow for long-term, precise monitoring of even the slightest structural changes, significantly improving maintenance efficiency compared to traditional systems. Data from the MEMS sensors is transmitted wirelessly via the 920 MHz band, which remains largely unaffected by internal building structures like walls and ceilings. The data is collected by a receiving device on each floor and sent to a diagnostic computer, minimizing the need for extensive wiring. Additionally, the team is working on an independent power supply unit to enable installation in areas without access to electricity. On the diagnostic PC, the "T-iAlert Structure" system runs, analyzing key parameters such as natural frequency, distortion, and tilt angle based on sensor data. This allows for continuous, long-term monitoring of building health. In the event of an earthquake with a magnitude of 3 or higher, the system automatically performs a vibration-based assessment. If any abnormalities are detected, it can identify potential secondary damage locations, enhancing safety and response time. Looking ahead, Dacheng Construction Group plans to apply this system in existing buildings and civil engineering structures starting in 2018, using the data to develop comprehensive Business Continuity Plans (BCPs). By April 2019, the company aims to fully deploy the system across its projects, marking a significant step forward in smart infrastructure management and disaster resilience in Japan.
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September 27, 2025